GFX 1.9.1 Update

Need to fix rounding/quantization issues before turning on pixman SSE2

CMS:

Will be flipping CMS pref on this week

Some handwaving on current testing (many tests have a dependency that when colors A and B are combined, the result is a predetermined C; this is not the case with arbitrary profiles -- we're forcing sRGB for input and output for the tests, thus exercising CMS while still getting consistent output)

Downloadable fonts:

Back to on-track, given new schedule

John making good progress, working through a pile of 'finish' issues now